you have Christmas light sets that don't work when you plug them in I've got an interesting tool you can pick up at the hardware store and this is called the light keeper Pro what it does is it solves the problem with many light sets so a standard incandescent set like this it has two pieces of metal and a filament on top and when that filament goes bad what's supposed to happen is this other piece of metal called a shunt is supposed to kick in and a lot electricity to flow to the rest of the set so that individual ball will be out but the rest of the set should work so we've got a set here that when we plug it in it's not working and so what we're going to do is plug it into the light keeper Pro and we're gonna trick press this trigger 20 times that's gonna send a high voltage surge through the set and it's going to activate the shunt all right and now we're gonna plug it in you may have to wait a few seconds for the shut it but right away amazing so just a fantastic tool if you have pre lit trees or silhouettes around the house you can taste these take these sets that normally you would just throw out and you can fix them with this and what it shows you now are the ball is the bulb or the balls that are out and now you can just go in and replace them so just an excellent tool if you do a lot of holiday lighting and I'll put the information underneath the video